./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:56:48,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:56:48,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:56:48,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:56:48,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:56:48,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:56:48,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:56:48,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:56:48,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:56:48,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:56:48,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:56:48,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:56:48,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:56:48,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:56:48,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:56:48,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:56:48,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:56:48,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:56:48,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:56:48,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:56:48,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:56:48,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:56:48,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:56:48,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:56:48,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:56:48,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:56:48,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:56:48,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:56:48,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:56:48,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:56:48,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:56:48,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:56:48,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:56:48,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:56:48,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:56:48,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:56:48,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:56:48,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:56:48,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:56:48,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:56:48,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:56:48,776 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:56:48,811 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:56:48,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:56:48,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:56:48,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:56:48,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:56:48,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:56:48,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:56:48,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:56:48,817 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:56:48,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:56:48,818 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:56:48,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:56:48,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:56:48,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:56:48,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:56:48,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:56:48,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:56:48,820 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:56:48,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:56:48,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:56:48,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:56:48,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:56:48,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:56:48,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:56:48,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:56:48,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:56:48,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:56:48,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:56:48,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:56:48,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:56:48,824 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:56:48,824 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:56:48,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:56:48,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 [2022-11-16 11:56:49,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:56:49,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:56:49,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:56:49,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:56:49,103 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:56:49,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2022-11-16 11:56:49,194 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/data/bc3a7901e/7d5946c807404aba9bf7379d556804f4/FLAGdab706ebf [2022-11-16 11:56:49,715 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:56:49,715 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2022-11-16 11:56:49,723 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/data/bc3a7901e/7d5946c807404aba9bf7379d556804f4/FLAGdab706ebf [2022-11-16 11:56:50,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/data/bc3a7901e/7d5946c807404aba9bf7379d556804f4 [2022-11-16 11:56:50,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:56:50,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:56:50,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:56:50,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:56:50,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:56:50,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3436769c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50, skipping insertion in model container [2022-11-16 11:56:50,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:56:50,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:56:50,323 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i[809,822] [2022-11-16 11:56:50,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:56:50,351 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:56:50,364 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i[809,822] [2022-11-16 11:56:50,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:56:50,395 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:56:50,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50 WrapperNode [2022-11-16 11:56:50,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:56:50,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:56:50,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:56:50,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:56:50,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,432 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2022-11-16 11:56:50,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:56:50,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:56:50,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:56:50,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:56:50,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,463 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:56:50,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:56:50,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:56:50,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:56:50,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (1/1) ... [2022-11-16 11:56:50,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:56:50,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:50,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:56:50,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:56:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:56:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:56:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:56:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:56:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:56:50,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:56:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:56:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:56:50,649 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:56:50,652 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:56:50,840 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:56:50,846 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:56:50,859 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:56:50,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:56:50 BoogieIcfgContainer [2022-11-16 11:56:50,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:56:50,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:56:50,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:56:50,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:56:50,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:56:50" (1/3) ... [2022-11-16 11:56:50,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5c8132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:56:50, skipping insertion in model container [2022-11-16 11:56:50,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:50" (2/3) ... [2022-11-16 11:56:50,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5c8132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:56:50, skipping insertion in model container [2022-11-16 11:56:50,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:56:50" (3/3) ... [2022-11-16 11:56:50,882 INFO L112 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2022-11-16 11:56:50,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:56:50,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:56:50,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:56:51,025 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7582ee7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:56:51,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:56:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:56:51,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:51,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:51,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:51,058 INFO L85 PathProgramCache]: Analyzing trace with hash 126038137, now seen corresponding path program 1 times [2022-11-16 11:56:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:51,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22917652] [2022-11-16 11:56:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:51,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:51,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:51,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22917652] [2022-11-16 11:56:51,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22917652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:51,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:51,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:56:51,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554845131] [2022-11-16 11:56:51,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:51,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:56:51,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:51,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:56:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:56:51,341 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:51,360 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-11-16 11:56:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:56:51,363 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:56:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:51,373 INFO L225 Difference]: With dead ends: 26 [2022-11-16 11:56:51,374 INFO L226 Difference]: Without dead ends: 10 [2022-11-16 11:56:51,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:56:51,388 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:51,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:56:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-16 11:56:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-16 11:56:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-16 11:56:51,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-11-16 11:56:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:51,432 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-16 11:56:51,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-16 11:56:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:56:51,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:51,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:51,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:56:51,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:51,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:51,438 INFO L85 PathProgramCache]: Analyzing trace with hash 122344053, now seen corresponding path program 1 times [2022-11-16 11:56:51,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:51,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908123850] [2022-11-16 11:56:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:51,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:51,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:51,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908123850] [2022-11-16 11:56:51,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908123850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:51,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:51,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:51,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662478691] [2022-11-16 11:56:51,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:51,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:51,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:51,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:51,623 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:51,656 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-11-16 11:56:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:56:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:51,658 INFO L225 Difference]: With dead ends: 17 [2022-11-16 11:56:51,658 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 11:56:51,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:51,662 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:51,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:56:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 11:56:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-16 11:56:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-16 11:56:51,670 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-11-16 11:56:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:51,670 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-16 11:56:51,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-16 11:56:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:56:51,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:51,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:51,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:56:51,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:51,673 INFO L85 PathProgramCache]: Analyzing trace with hash -450855509, now seen corresponding path program 1 times [2022-11-16 11:56:51,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:51,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198365595] [2022-11-16 11:56:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:51,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:52,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:52,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198365595] [2022-11-16 11:56:52,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198365595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:52,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265411783] [2022-11-16 11:56:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:52,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:52,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:52,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:52,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:56:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:52,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:56:52,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:52,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:56:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:52,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:52,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 11:56:52,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 11:56:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:52,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265411783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:52,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:52,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-16 11:56:52,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872759988] [2022-11-16 11:56:52,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:52,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:56:52,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:52,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:56:52,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:56:52,407 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:52,488 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-16 11:56:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:56:52,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:56:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:52,490 INFO L225 Difference]: With dead ends: 17 [2022-11-16 11:56:52,490 INFO L226 Difference]: Without dead ends: 15 [2022-11-16 11:56:52,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:56:52,492 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:52,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:56:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-16 11:56:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2022-11-16 11:56:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-16 11:56:52,496 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-11-16 11:56:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:52,497 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-16 11:56:52,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-16 11:56:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:56:52,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:52,498 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:52,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:52,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:52,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:52,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:52,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1068940558, now seen corresponding path program 1 times [2022-11-16 11:56:52,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:52,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225147313] [2022-11-16 11:56:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:52,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:52,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:52,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225147313] [2022-11-16 11:56:52,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225147313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:52,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687386928] [2022-11-16 11:56:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:52,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:52,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:52,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:52,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:56:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:52,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:56:52,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:52,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:53,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687386928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:53,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:53,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-16 11:56:53,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401274085] [2022-11-16 11:56:53,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:53,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:56:53,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:53,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:56:53,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:56:53,012 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:53,108 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-16 11:56:53,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:56:53,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:56:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:53,111 INFO L225 Difference]: With dead ends: 30 [2022-11-16 11:56:53,112 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 11:56:53,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:56:53,116 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:53,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:56:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 11:56:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2022-11-16 11:56:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-16 11:56:53,121 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2022-11-16 11:56:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:53,122 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-16 11:56:53,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-16 11:56:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:56:53,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:53,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:53,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:53,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:53,329 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:53,329 INFO L85 PathProgramCache]: Analyzing trace with hash 407528232, now seen corresponding path program 2 times [2022-11-16 11:56:53,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:53,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421408775] [2022-11-16 11:56:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:53,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:53,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:53,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421408775] [2022-11-16 11:56:53,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421408775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:53,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536031628] [2022-11-16 11:56:53,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:56:53,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:53,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:53,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:56:53,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:56:53,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:53,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:56:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:53,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:56:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:53,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:53,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:56:53,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:56:54,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:56:54,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:56:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:54,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536031628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:54,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:54,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-16 11:56:54,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505375692] [2022-11-16 11:56:54,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:54,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:56:54,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:54,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:56:54,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:56:54,019 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:54,167 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-11-16 11:56:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:56:54,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:56:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:54,168 INFO L225 Difference]: With dead ends: 21 [2022-11-16 11:56:54,168 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 11:56:54,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:56:54,170 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:54,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 40 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:56:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 11:56:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-11-16 11:56:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-16 11:56:54,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-11-16 11:56:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:54,176 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-16 11:56:54,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-16 11:56:54,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:56:54,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:54,177 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:54,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 11:56:54,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:54,382 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:54,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1194192811, now seen corresponding path program 3 times [2022-11-16 11:56:54,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:54,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065015232] [2022-11-16 11:56:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:54,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:54,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:54,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065015232] [2022-11-16 11:56:54,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065015232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:54,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889051548] [2022-11-16 11:56:54,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:56:54,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:54,490 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:54,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:56:54,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:56:54,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:54,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:56:54,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:54,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:54,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889051548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:54,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:54,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-16 11:56:54,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617961689] [2022-11-16 11:56:54,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:54,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:56:54,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:56:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:56:54,742 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:54,840 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-11-16 11:56:54,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:56:54,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:56:54,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:54,842 INFO L225 Difference]: With dead ends: 37 [2022-11-16 11:56:54,843 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 11:56:54,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:56:54,846 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:54,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:56:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 11:56:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-11-16 11:56:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-16 11:56:54,861 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-11-16 11:56:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:54,862 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-16 11:56:54,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-16 11:56:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:56:54,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:54,865 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:54,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:55,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:55,071 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash -298048117, now seen corresponding path program 4 times [2022-11-16 11:56:55,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:55,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764621885] [2022-11-16 11:56:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:55,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764621885] [2022-11-16 11:56:55,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764621885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183456658] [2022-11-16 11:56:55,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:56:55,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:55,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:55,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:55,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:56:55,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:56:55,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:55,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:56:55,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:55,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:56:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:55,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:55,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:56:55,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:56:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:55,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183456658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:55,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:55,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-16 11:56:55,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830417063] [2022-11-16 11:56:55,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:55,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:56:55,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:56:55,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:56:55,859 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:56,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:56,095 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-11-16 11:56:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:56:56,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:56:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:56,097 INFO L225 Difference]: With dead ends: 25 [2022-11-16 11:56:56,097 INFO L226 Difference]: Without dead ends: 23 [2022-11-16 11:56:56,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:56:56,098 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:56,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 69 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:56:56,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-16 11:56:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-11-16 11:56:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-11-16 11:56:56,104 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2022-11-16 11:56:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:56,104 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-11-16 11:56:56,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-11-16 11:56:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:56:56,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:56,105 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:56,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:56,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:56,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1449259246, now seen corresponding path program 5 times [2022-11-16 11:56:56,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:56,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288848429] [2022-11-16 11:56:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:56,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288848429] [2022-11-16 11:56:56,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288848429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289283812] [2022-11-16 11:56:56,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:56:56,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:56,464 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:56,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:56:56,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:56:56,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:56,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:56:56,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:56,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:56,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289283812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:56,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:56,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-16 11:56:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476247676] [2022-11-16 11:56:56,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:56,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:56:56,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:56,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:56:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:56:56,752 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:56,851 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-11-16 11:56:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:56:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:56:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:56,852 INFO L225 Difference]: With dead ends: 44 [2022-11-16 11:56:56,853 INFO L226 Difference]: Without dead ends: 28 [2022-11-16 11:56:56,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:56:56,854 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:56,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:56:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-16 11:56:56,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-11-16 11:56:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-16 11:56:56,860 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2022-11-16 11:56:56,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:56,860 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-16 11:56:56,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-16 11:56:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:56:56,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:56,862 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:56,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:57,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:56:57,067 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:57,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:57,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1156487496, now seen corresponding path program 6 times [2022-11-16 11:56:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:57,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381399058] [2022-11-16 11:56:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:57,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:57,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:57,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381399058] [2022-11-16 11:56:57,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381399058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:57,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918604381] [2022-11-16 11:56:57,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:56:57,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:57,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:57,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:57,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:56:57,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 11:56:57,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:57,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 11:56:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:57,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:56:57,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:56:57,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 11:56:58,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:56:58,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:56:58,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 26 [2022-11-16 11:56:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:58,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:58,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2022-11-16 11:56:58,877 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:56:58,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4152 treesize of output 4040 [2022-11-16 11:56:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:59,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918604381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:59,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:59,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 36 [2022-11-16 11:56:59,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080787762] [2022-11-16 11:56:59,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:59,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:56:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:56:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:56:59,939 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:00,785 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-11-16 11:57:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:57:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:57:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:00,789 INFO L225 Difference]: With dead ends: 44 [2022-11-16 11:57:00,789 INFO L226 Difference]: Without dead ends: 28 [2022-11-16 11:57:00,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=422, Invalid=2548, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:57:00,791 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 120 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:00,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 85 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 230 Invalid, 0 Unknown, 157 Unchecked, 0.2s Time] [2022-11-16 11:57:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-16 11:57:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-11-16 11:57:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-11-16 11:57:00,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2022-11-16 11:57:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:00,818 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-11-16 11:57:00,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-11-16 11:57:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:57:00,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:00,820 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:00,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:01,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:01,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1052957333, now seen corresponding path program 7 times [2022-11-16 11:57:01,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:01,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237415722] [2022-11-16 11:57:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:01,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:01,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237415722] [2022-11-16 11:57:01,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237415722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:01,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292609337] [2022-11-16 11:57:01,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:57:01,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:01,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:01,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:01,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:57:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:01,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:57:01,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:01,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:57:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:01,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:02,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:02,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:02,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:02,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:02,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292609337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:02,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:02,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-16 11:57:02,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395849964] [2022-11-16 11:57:02,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:02,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:57:02,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:57:02,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:57:02,204 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:02,592 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2022-11-16 11:57:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:57:02,593 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-16 11:57:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:02,593 INFO L225 Difference]: With dead ends: 33 [2022-11-16 11:57:02,593 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 11:57:02,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:57:02,595 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:02,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 142 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 11:57:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-16 11:57:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-16 11:57:02,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2022-11-16 11:57:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:02,602 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-16 11:57:02,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-16 11:57:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:57:02,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:02,603 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:02,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:02,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:57:02,804 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:02,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1794016050, now seen corresponding path program 8 times [2022-11-16 11:57:02,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:02,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182854465] [2022-11-16 11:57:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:02,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:03,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:03,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182854465] [2022-11-16 11:57:03,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182854465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:03,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430684724] [2022-11-16 11:57:03,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:03,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:03,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:03,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:57:03,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:57:03,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:03,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:57:03,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:03,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:03,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430684724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:03,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:03,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-16 11:57:03,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035950757] [2022-11-16 11:57:03,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:03,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:57:03,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:03,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:57:03,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:57:03,391 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:03,564 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-11-16 11:57:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:57:03,565 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-16 11:57:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:03,565 INFO L225 Difference]: With dead ends: 58 [2022-11-16 11:57:03,565 INFO L226 Difference]: Without dead ends: 36 [2022-11-16 11:57:03,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:57:03,566 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:03,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 63 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-16 11:57:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-11-16 11:57:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-11-16 11:57:03,574 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2022-11-16 11:57:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:03,574 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-11-16 11:57:03,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-11-16 11:57:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:57:03,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:03,575 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:03,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:03,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:57:03,781 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:03,782 INFO L85 PathProgramCache]: Analyzing trace with hash -528189592, now seen corresponding path program 9 times [2022-11-16 11:57:03,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:03,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875362397] [2022-11-16 11:57:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:03,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:04,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:04,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875362397] [2022-11-16 11:57:04,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875362397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:04,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298622763] [2022-11-16 11:57:04,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:57:04,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:04,343 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:04,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:57:04,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:57:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:04,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 11:57:04,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:04,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:57:05,055 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 11:57:05,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2022-11-16 11:57:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:05,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:06,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:57:06,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-16 11:57:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:06,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298622763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:06,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:06,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2022-11-16 11:57:06,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143085439] [2022-11-16 11:57:06,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:06,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 11:57:06,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 11:57:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1760, Unknown=1, NotChecked=0, Total=1980 [2022-11-16 11:57:06,853 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:08,227 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-11-16 11:57:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:57:08,228 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 11:57:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:08,228 INFO L225 Difference]: With dead ends: 58 [2022-11-16 11:57:08,228 INFO L226 Difference]: Without dead ends: 36 [2022-11-16 11:57:08,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=586, Invalid=4383, Unknown=1, NotChecked=0, Total=4970 [2022-11-16 11:57:08,230 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:08,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 185 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 498 Invalid, 0 Unknown, 83 Unchecked, 0.4s Time] [2022-11-16 11:57:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-16 11:57:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-11-16 11:57:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-11-16 11:57:08,245 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-11-16 11:57:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:08,245 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-11-16 11:57:08,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-11-16 11:57:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 11:57:08,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:08,251 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:08,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:08,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:57:08,456 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:08,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1812036939, now seen corresponding path program 10 times [2022-11-16 11:57:08,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:08,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913806286] [2022-11-16 11:57:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:08,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:09,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:09,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913806286] [2022-11-16 11:57:09,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913806286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:09,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700263193] [2022-11-16 11:57:09,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:57:09,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:09,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:09,065 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:09,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:57:09,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:57:09,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:09,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 11:57:09,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:09,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:57:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:09,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:09,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:09,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:10,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:10,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:10,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700263193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:10,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:10,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-11-16 11:57:10,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838077210] [2022-11-16 11:57:10,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:10,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:57:10,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:10,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:57:10,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:57:10,047 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:10,591 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2022-11-16 11:57:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:57:10,592 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-16 11:57:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:10,592 INFO L225 Difference]: With dead ends: 41 [2022-11-16 11:57:10,592 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 11:57:10,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=180, Invalid=1800, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:57:10,593 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:10,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 214 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:57:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 11:57:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-11-16 11:57:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-16 11:57:10,602 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2022-11-16 11:57:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:10,602 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-16 11:57:10,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-16 11:57:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:57:10,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:10,603 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:10,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:10,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:57:10,809 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:10,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:10,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1046700206, now seen corresponding path program 11 times [2022-11-16 11:57:10,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:10,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292634592] [2022-11-16 11:57:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:10,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:11,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:11,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292634592] [2022-11-16 11:57:11,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292634592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:11,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956789009] [2022-11-16 11:57:11,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:57:11,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:11,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:11,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:57:11,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-16 11:57:11,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:11,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:57:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:11,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:11,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956789009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:11,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:11,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-11-16 11:57:11,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197509270] [2022-11-16 11:57:11,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:11,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 11:57:11,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:11,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 11:57:11,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:57:11,687 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:11,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:11,866 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-11-16 11:57:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:57:11,867 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-16 11:57:11,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:11,867 INFO L225 Difference]: With dead ends: 72 [2022-11-16 11:57:11,867 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 11:57:11,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:57:11,869 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:11,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 70 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:11,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 11:57:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2022-11-16 11:57:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-11-16 11:57:11,879 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2022-11-16 11:57:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:11,879 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-11-16 11:57:11,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-11-16 11:57:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:57:11,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:11,880 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:11,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:12,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:12,086 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:12,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:12,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1382940040, now seen corresponding path program 12 times [2022-11-16 11:57:12,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:12,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046124925] [2022-11-16 11:57:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:12,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:12,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046124925] [2022-11-16 11:57:12,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046124925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597202904] [2022-11-16 11:57:12,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:57:12,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:12,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:12,840 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:12,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:57:13,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-16 11:57:13,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:13,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 11:57:13,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:13,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:57:13,882 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 11:57:13,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2022-11-16 11:57:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:13,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:14,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:57:14,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-16 11:57:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 63 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:15,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597202904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:15,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:15,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 59 [2022-11-16 11:57:15,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372064242] [2022-11-16 11:57:15,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:15,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-16 11:57:15,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:15,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-16 11:57:15,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=3073, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 11:57:15,395 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 59 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:17,949 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-11-16 11:57:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 11:57:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-16 11:57:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:17,951 INFO L225 Difference]: With dead ends: 72 [2022-11-16 11:57:17,951 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 11:57:17,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=981, Invalid=8139, Unknown=0, NotChecked=0, Total=9120 [2022-11-16 11:57:17,954 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 130 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:17,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 135 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 963 Invalid, 0 Unknown, 206 Unchecked, 0.6s Time] [2022-11-16 11:57:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 11:57:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-11-16 11:57:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-11-16 11:57:17,965 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2022-11-16 11:57:17,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:17,966 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-11-16 11:57:17,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-11-16 11:57:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:57:17,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:17,967 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:17,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:18,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:57:18,173 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1575431467, now seen corresponding path program 13 times [2022-11-16 11:57:18,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:18,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787216742] [2022-11-16 11:57:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:18,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:18,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:18,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787216742] [2022-11-16 11:57:18,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787216742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:18,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8782567] [2022-11-16 11:57:18,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:57:18,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:18,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:18,963 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:18,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:57:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 11:57:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:19,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:57:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:19,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:20,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:20,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:20,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:20,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:20,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8782567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:20,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:20,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2022-11-16 11:57:20,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353692547] [2022-11-16 11:57:20,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:20,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 11:57:20,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:20,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 11:57:20,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:57:20,227 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:21,050 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-11-16 11:57:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:57:21,050 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-16 11:57:21,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:21,051 INFO L225 Difference]: With dead ends: 49 [2022-11-16 11:57:21,051 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 11:57:21,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:57:21,052 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:21,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 361 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:57:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 11:57:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-16 11:57:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-16 11:57:21,070 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2022-11-16 11:57:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:21,071 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-16 11:57:21,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-16 11:57:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:57:21,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:21,076 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:21,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:21,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:57:21,282 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1718983822, now seen corresponding path program 14 times [2022-11-16 11:57:21,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:21,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385243875] [2022-11-16 11:57:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:21,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:21,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:21,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385243875] [2022-11-16 11:57:21,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385243875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:21,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494383026] [2022-11-16 11:57:21,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:21,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:21,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:21,678 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:21,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:57:21,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:57:21,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:21,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:57:21,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:22,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:22,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494383026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:22,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:22,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-11-16 11:57:22,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803015747] [2022-11-16 11:57:22,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:22,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:57:22,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:22,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:57:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:57:22,405 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:22,655 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-11-16 11:57:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:57:22,655 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-16 11:57:22,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:22,656 INFO L225 Difference]: With dead ends: 86 [2022-11-16 11:57:22,656 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 11:57:22,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:57:22,657 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:22,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 81 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 11:57:22,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-11-16 11:57:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-11-16 11:57:22,669 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2022-11-16 11:57:22,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:22,669 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-11-16 11:57:22,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:22,670 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-11-16 11:57:22,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:57:22,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:22,671 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:22,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:22,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:57:22,882 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:22,882 INFO L85 PathProgramCache]: Analyzing trace with hash 814558120, now seen corresponding path program 15 times [2022-11-16 11:57:22,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:22,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047623680] [2022-11-16 11:57:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:22,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:23,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:23,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047623680] [2022-11-16 11:57:23,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047623680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:23,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597108435] [2022-11-16 11:57:23,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:57:23,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:23,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:23,787 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:23,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:57:24,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-16 11:57:24,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:24,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 11:57:24,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:24,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:57:25,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-11-16 11:57:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:25,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:25,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:25,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:25,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:25,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:25,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597108435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:25,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:25,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 46 [2022-11-16 11:57:25,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715749036] [2022-11-16 11:57:25,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:25,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:57:25,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:25,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:57:25,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1945, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:57:25,662 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:26,768 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2022-11-16 11:57:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:57:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-16 11:57:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:26,769 INFO L225 Difference]: With dead ends: 53 [2022-11-16 11:57:26,769 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 11:57:26,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=246, Invalid=3536, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 11:57:26,770 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:26,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 361 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:57:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 11:57:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-11-16 11:57:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-16 11:57:26,783 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2022-11-16 11:57:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:26,783 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-16 11:57:26,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-16 11:57:26,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 11:57:26,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:26,784 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:26,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:26,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:57:26,985 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:26,985 INFO L85 PathProgramCache]: Analyzing trace with hash -59476011, now seen corresponding path program 16 times [2022-11-16 11:57:26,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:26,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088792724] [2022-11-16 11:57:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:26,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:27,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088792724] [2022-11-16 11:57:27,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088792724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056161372] [2022-11-16 11:57:27,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:57:27,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:27,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:27,423 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:27,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:57:27,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:57:27,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:27,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:57:27,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:27,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:28,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056161372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:28,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:28,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-11-16 11:57:28,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658351714] [2022-11-16 11:57:28,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:28,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:57:28,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:57:28,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:57:28,234 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:28,524 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-11-16 11:57:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:57:28,525 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-16 11:57:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:28,525 INFO L225 Difference]: With dead ends: 93 [2022-11-16 11:57:28,525 INFO L226 Difference]: Without dead ends: 56 [2022-11-16 11:57:28,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:57:28,529 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:28,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 111 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-16 11:57:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2022-11-16 11:57:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-11-16 11:57:28,547 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2022-11-16 11:57:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:28,547 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-11-16 11:57:28,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-11-16 11:57:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 11:57:28,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:28,552 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:28,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:28,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:28,764 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1204565259, now seen corresponding path program 17 times [2022-11-16 11:57:28,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:28,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947350789] [2022-11-16 11:57:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:28,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:29,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947350789] [2022-11-16 11:57:29,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947350789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:29,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236078427] [2022-11-16 11:57:29,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:57:29,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:29,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:29,680 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:29,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:57:29,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-16 11:57:29,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:29,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 11:57:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:30,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:57:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:31,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:31,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:31,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:31,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:31,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:31,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236078427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:31,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:31,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 53 [2022-11-16 11:57:31,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592360608] [2022-11-16 11:57:31,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:31,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 11:57:31,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 11:57:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2597, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:57:31,411 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 53 states, 53 states have (on average 1.9056603773584906) internal successors, (101), 53 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:32,505 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-11-16 11:57:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 11:57:32,506 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9056603773584906) internal successors, (101), 53 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-16 11:57:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:32,506 INFO L225 Difference]: With dead ends: 57 [2022-11-16 11:57:32,506 INFO L226 Difference]: Without dead ends: 55 [2022-11-16 11:57:32,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=285, Invalid=4271, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 11:57:32,508 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:32,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 411 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:57:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-16 11:57:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-11-16 11:57:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-16 11:57:32,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2022-11-16 11:57:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:32,521 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-16 11:57:32,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9056603773584906) internal successors, (101), 53 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-16 11:57:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 11:57:32,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:32,522 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:32,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-16 11:57:32,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:32,723 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:32,723 INFO L85 PathProgramCache]: Analyzing trace with hash 756666258, now seen corresponding path program 18 times [2022-11-16 11:57:32,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:32,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051145490] [2022-11-16 11:57:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:32,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:33,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:33,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051145490] [2022-11-16 11:57:33,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051145490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:33,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007672360] [2022-11-16 11:57:33,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:57:33,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:33,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:33,204 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:33,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:57:33,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-16 11:57:33,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:33,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:57:33,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:34,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:34,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007672360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:34,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:34,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2022-11-16 11:57:34,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900355415] [2022-11-16 11:57:34,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:34,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 11:57:34,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:34,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 11:57:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:57:34,543 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:34,843 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-11-16 11:57:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:57:34,843 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-16 11:57:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:34,844 INFO L225 Difference]: With dead ends: 100 [2022-11-16 11:57:34,844 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 11:57:34,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 66 SyntacticMatches, 24 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:57:34,845 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 155 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:34,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 110 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 11:57:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-11-16 11:57:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-11-16 11:57:34,859 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2022-11-16 11:57:34,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:34,859 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-11-16 11:57:34,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:34,860 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-11-16 11:57:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 11:57:34,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:34,860 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:34,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:35,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:35,061 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:35,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1598292424, now seen corresponding path program 19 times [2022-11-16 11:57:35,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:35,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608892245] [2022-11-16 11:57:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:35,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:36,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:36,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608892245] [2022-11-16 11:57:36,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608892245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:36,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377303911] [2022-11-16 11:57:36,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:57:36,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:36,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:36,116 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:36,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:57:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 11:57:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:36,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:57:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:37,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:37,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:37,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:37,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:37,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:37,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377303911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:37,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:37,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2022-11-16 11:57:37,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324295504] [2022-11-16 11:57:37,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:37,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 11:57:37,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:37,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 11:57:37,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2810, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:57:37,873 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 55 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 55 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:39,037 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-11-16 11:57:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 11:57:39,043 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 55 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-16 11:57:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:39,043 INFO L225 Difference]: With dead ends: 61 [2022-11-16 11:57:39,043 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 11:57:39,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=280, Invalid=4550, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 11:57:39,045 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:39,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 552 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:57:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 11:57:39,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-11-16 11:57:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-16 11:57:39,061 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2022-11-16 11:57:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:39,062 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-16 11:57:39,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 55 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-16 11:57:39,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:57:39,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:39,063 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:39,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:39,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:39,269 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:39,269 INFO L85 PathProgramCache]: Analyzing trace with hash 726953397, now seen corresponding path program 20 times [2022-11-16 11:57:39,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:39,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235676078] [2022-11-16 11:57:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:39,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:39,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:39,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235676078] [2022-11-16 11:57:39,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235676078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:39,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89144604] [2022-11-16 11:57:39,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:39,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:39,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:39,847 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:39,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:57:39,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:57:39,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:39,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:57:39,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:40,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:40,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89144604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:40,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:40,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2022-11-16 11:57:40,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197359409] [2022-11-16 11:57:40,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:40,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 11:57:40,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 11:57:40,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 11:57:40,830 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:41,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:41,160 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2022-11-16 11:57:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:57:41,160 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-16 11:57:41,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:41,161 INFO L225 Difference]: With dead ends: 107 [2022-11-16 11:57:41,161 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 11:57:41,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 71 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 11:57:41,162 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 174 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:41,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 111 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:41,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 11:57:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-11-16 11:57:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-11-16 11:57:41,176 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2022-11-16 11:57:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:41,176 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-11-16 11:57:41,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:41,177 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-11-16 11:57:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 11:57:41,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:41,177 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:41,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:41,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:41,378 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash -66153237, now seen corresponding path program 21 times [2022-11-16 11:57:41,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:41,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987514403] [2022-11-16 11:57:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:41,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:42,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987514403] [2022-11-16 11:57:42,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987514403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231637810] [2022-11-16 11:57:42,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:57:42,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:42,815 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:42,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:57:43,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-16 11:57:43,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-16 11:57:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:43,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:57:45,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:45,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:57:45,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:57:45,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 31 [2022-11-16 11:57:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:45,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:46,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-11-16 11:57:46,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:57:46,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2022-11-16 11:57:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:46,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231637810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:46,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:46,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 73 [2022-11-16 11:57:46,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572325719] [2022-11-16 11:57:46,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:46,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 11:57:46,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 11:57:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=4998, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 11:57:46,696 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:48,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:48,815 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2022-11-16 11:57:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 11:57:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-16 11:57:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:48,816 INFO L225 Difference]: With dead ends: 65 [2022-11-16 11:57:48,816 INFO L226 Difference]: Without dead ends: 63 [2022-11-16 11:57:48,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=437, Invalid=7935, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 11:57:48,817 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 116 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:48,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 612 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:57:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-16 11:57:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-11-16 11:57:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:48,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-16 11:57:48,829 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2022-11-16 11:57:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:48,829 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-16 11:57:48,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-16 11:57:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 11:57:48,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:48,830 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:48,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:49,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:49,030 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash 623698866, now seen corresponding path program 22 times [2022-11-16 11:57:49,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:49,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385882704] [2022-11-16 11:57:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:49,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:49,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:49,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385882704] [2022-11-16 11:57:49,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385882704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:49,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015751551] [2022-11-16 11:57:49,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:57:49,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:49,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:49,675 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:49,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:57:49,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:57:49,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:49,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:57:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:50,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:50,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015751551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:50,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:50,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-11-16 11:57:50,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451008164] [2022-11-16 11:57:50,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:50,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 11:57:50,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:50,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 11:57:50,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:57:50,724 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:51,087 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2022-11-16 11:57:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:57:51,088 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-16 11:57:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:51,089 INFO L225 Difference]: With dead ends: 114 [2022-11-16 11:57:51,089 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 11:57:51,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 76 SyntacticMatches, 28 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 11:57:51,090 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 180 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:51,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 152 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 11:57:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-11-16 11:57:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-11-16 11:57:51,103 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2022-11-16 11:57:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:51,103 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-11-16 11:57:51,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-11-16 11:57:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:57:51,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:51,104 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:51,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:51,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:57:51,310 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 829718504, now seen corresponding path program 23 times [2022-11-16 11:57:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:51,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577607788] [2022-11-16 11:57:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:51,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:52,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:52,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577607788] [2022-11-16 11:57:52,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577607788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:52,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019325725] [2022-11-16 11:57:52,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:57:52,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:52,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:52,610 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:52,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:57:52,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-16 11:57:52,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:52,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-16 11:57:52,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:53,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:57:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:54,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:54,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:54,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:54,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:57:54,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:57:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:55,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019325725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:55,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:55,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 65 [2022-11-16 11:57:55,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215659421] [2022-11-16 11:57:55,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:55,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 11:57:55,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:55,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 11:57:55,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3965, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 11:57:55,019 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 65 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 65 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:56,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:56,547 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2022-11-16 11:57:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:57:56,548 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 65 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-16 11:57:56,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:56,549 INFO L225 Difference]: With dead ends: 69 [2022-11-16 11:57:56,549 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 11:57:56,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=365, Invalid=6775, Unknown=0, NotChecked=0, Total=7140 [2022-11-16 11:57:56,551 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 121 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:56,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 592 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:57:56,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 11:57:56,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-11-16 11:57:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-11-16 11:57:56,570 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2022-11-16 11:57:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:56,570 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-11-16 11:57:56,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 65 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-11-16 11:57:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:57:56,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:56,572 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:56,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-16 11:57:56,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:57:56,778 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:56,778 INFO L85 PathProgramCache]: Analyzing trace with hash 611957653, now seen corresponding path program 24 times [2022-11-16 11:57:56,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:56,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419189036] [2022-11-16 11:57:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:56,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:57,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:57,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419189036] [2022-11-16 11:57:57,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419189036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:57,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274265967] [2022-11-16 11:57:57,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:57:57,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:57,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:57,467 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:57,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:57:57,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-16 11:57:57,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:57,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:57:57,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:58,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:58,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274265967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:58,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:58,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-11-16 11:57:58,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498901585] [2022-11-16 11:57:58,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:58,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 11:57:58,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 11:57:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:57:58,997 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:59,373 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2022-11-16 11:57:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 11:57:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-16 11:57:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:59,374 INFO L225 Difference]: With dead ends: 121 [2022-11-16 11:57:59,374 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 11:57:59,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 81 SyntacticMatches, 30 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 11:57:59,375 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 198 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:59,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 117 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 11:57:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-11-16 11:57:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-11-16 11:57:59,388 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2022-11-16 11:57:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:59,388 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-11-16 11:57:59,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-11-16 11:57:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 11:57:59,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:59,389 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:59,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:59,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:57:59,589 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:59,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1317817547, now seen corresponding path program 25 times [2022-11-16 11:57:59,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:59,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165463721] [2022-11-16 11:57:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:59,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:00,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:00,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165463721] [2022-11-16 11:58:00,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165463721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:00,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947360564] [2022-11-16 11:58:00,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:58:00,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:00,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:00,918 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:00,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 11:58:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:01,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-16 11:58:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:01,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:58:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:03,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:03,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:58:03,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:58:03,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:58:03,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:58:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:03,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947360564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:03,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:03,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2022-11-16 11:58:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284468723] [2022-11-16 11:58:03,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:03,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-16 11:58:03,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:03,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-16 11:58:03,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=4226, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 11:58:03,415 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 67 states, 67 states have (on average 1.955223880597015) internal successors, (131), 67 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:05,096 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-11-16 11:58:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:58:05,096 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.955223880597015) internal successors, (131), 67 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-16 11:58:05,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:05,097 INFO L225 Difference]: With dead ends: 73 [2022-11-16 11:58:05,097 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 11:58:05,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=340, Invalid=6800, Unknown=0, NotChecked=0, Total=7140 [2022-11-16 11:58:05,098 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:05,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 779 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:58:05,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 11:58:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-16 11:58:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-11-16 11:58:05,116 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2022-11-16 11:58:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:05,116 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-11-16 11:58:05,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.955223880597015) internal successors, (131), 67 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-11-16 11:58:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 11:58:05,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:05,117 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:05,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:05,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:05,323 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1188716590, now seen corresponding path program 26 times [2022-11-16 11:58:05,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:05,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135286044] [2022-11-16 11:58:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:05,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:06,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:06,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135286044] [2022-11-16 11:58:06,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135286044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:06,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746766105] [2022-11-16 11:58:06,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:58:06,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:06,078 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:06,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 11:58:06,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:58:06,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:06,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:58:06,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:06,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:07,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746766105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:07,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:07,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-11-16 11:58:07,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940062857] [2022-11-16 11:58:07,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:07,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 11:58:07,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:07,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 11:58:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:58:07,405 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:07,804 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2022-11-16 11:58:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 11:58:07,804 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-16 11:58:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:07,805 INFO L225 Difference]: With dead ends: 128 [2022-11-16 11:58:07,805 INFO L226 Difference]: Without dead ends: 76 [2022-11-16 11:58:07,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 86 SyntacticMatches, 32 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 11:58:07,806 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 208 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:07,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 143 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:58:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-16 11:58:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2022-11-16 11:58:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-11-16 11:58:07,822 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2022-11-16 11:58:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:07,823 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-11-16 11:58:07,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-11-16 11:58:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:58:07,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:07,823 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:07,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:08,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:58:08,029 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:08,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:08,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2004834808, now seen corresponding path program 27 times [2022-11-16 11:58:08,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:08,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154376448] [2022-11-16 11:58:08,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:08,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:09,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:09,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154376448] [2022-11-16 11:58:09,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154376448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:09,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129982055] [2022-11-16 11:58:09,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:58:09,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:09,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:09,569 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:09,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 11:58:10,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-16 11:58:10,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:10,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 11:58:10,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:11,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:58:12,989 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 11:58:12,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2022-11-16 11:58:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 330 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:13,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:15,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:58:15,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-16 11:58:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 315 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:16,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129982055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:16,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:16,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 105 [2022-11-16 11:58:16,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577764311] [2022-11-16 11:58:16,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:16,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-16 11:58:16,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-16 11:58:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=9976, Unknown=0, NotChecked=0, Total=10920 [2022-11-16 11:58:16,879 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 105 states, 105 states have (on average 1.9047619047619047) internal successors, (200), 105 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:22,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:22,485 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2022-11-16 11:58:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-16 11:58:22,486 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9047619047619047) internal successors, (200), 105 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-16 11:58:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:22,486 INFO L225 Difference]: With dead ends: 128 [2022-11-16 11:58:22,487 INFO L226 Difference]: Without dead ends: 76 [2022-11-16 11:58:22,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6952 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2496, Invalid=26574, Unknown=0, NotChecked=0, Total=29070 [2022-11-16 11:58:22,490 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 227 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 3022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:22,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 963 Invalid, 3022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2552 Invalid, 0 Unknown, 339 Unchecked, 1.4s Time] [2022-11-16 11:58:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-16 11:58:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-11-16 11:58:22,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:22,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-11-16 11:58:22,510 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2022-11-16 11:58:22,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:22,510 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-11-16 11:58:22,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9047619047619047) internal successors, (200), 105 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-11-16 11:58:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 11:58:22,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:22,511 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:22,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:22,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:22,711 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:22,712 INFO L85 PathProgramCache]: Analyzing trace with hash -190620501, now seen corresponding path program 28 times [2022-11-16 11:58:22,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:22,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373839043] [2022-11-16 11:58:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:22,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:24,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:24,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373839043] [2022-11-16 11:58:24,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373839043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:24,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8864856] [2022-11-16 11:58:24,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:58:24,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:24,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:24,361 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:24,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 11:58:24,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:58:24,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:24,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-16 11:58:24,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:25,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:58:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:26,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:27,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:58:27,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:58:27,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:58:27,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:58:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:27,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8864856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:27,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:27,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2022-11-16 11:58:27,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480959609] [2022-11-16 11:58:27,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:27,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-16 11:58:27,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:27,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-16 11:58:27,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2022-11-16 11:58:27,271 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:29,331 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2022-11-16 11:58:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 11:58:29,331 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-16 11:58:29,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:29,332 INFO L225 Difference]: With dead ends: 81 [2022-11-16 11:58:29,332 INFO L226 Difference]: Without dead ends: 79 [2022-11-16 11:58:29,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=380, Invalid=8550, Unknown=0, NotChecked=0, Total=8930 [2022-11-16 11:58:29,333 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 135 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 2954 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 2973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:29,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1023 Invalid, 2973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2954 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:58:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-16 11:58:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-11-16 11:58:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-11-16 11:58:29,354 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2022-11-16 11:58:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:29,355 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-11-16 11:58:29,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-11-16 11:58:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 11:58:29,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:29,356 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:29,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:29,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:29,562 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:29,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:29,562 INFO L85 PathProgramCache]: Analyzing trace with hash -823786510, now seen corresponding path program 29 times [2022-11-16 11:58:29,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:29,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403315204] [2022-11-16 11:58:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:29,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:30,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:30,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403315204] [2022-11-16 11:58:30,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403315204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:30,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454444145] [2022-11-16 11:58:30,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:58:30,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:30,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:30,465 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:30,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 11:58:30,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-11-16 11:58:30,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:30,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:58:30,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:31,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:32,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454444145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:32,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:32,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2022-11-16 11:58:32,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322006403] [2022-11-16 11:58:32,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:32,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-16 11:58:32,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:32,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-16 11:58:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 11:58:32,319 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:32,815 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2022-11-16 11:58:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 11:58:32,815 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-16 11:58:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:32,816 INFO L225 Difference]: With dead ends: 142 [2022-11-16 11:58:32,816 INFO L226 Difference]: Without dead ends: 84 [2022-11-16 11:58:32,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 96 SyntacticMatches, 36 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2730 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2022-11-16 11:58:32,817 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 313 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:32,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 174 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:58:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-16 11:58:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-11-16 11:58:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-11-16 11:58:32,835 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2022-11-16 11:58:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:32,835 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-11-16 11:58:32,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-11-16 11:58:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 11:58:32,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:32,836 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:32,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:33,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 11:58:33,037 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash -196447192, now seen corresponding path program 30 times [2022-11-16 11:58:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:33,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6882513] [2022-11-16 11:58:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:34,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6882513] [2022-11-16 11:58:34,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6882513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938814060] [2022-11-16 11:58:34,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:58:34,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:34,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:34,784 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:34,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 11:58:35,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-11-16 11:58:35,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:35,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-16 11:58:35,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:36,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:58:38,329 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 11:58:38,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2022-11-16 11:58:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 425 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:38,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:41,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:58:41,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-16 11:58:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 392 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:43,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938814060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:43,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:43,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 42] total 119 [2022-11-16 11:58:43,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129277859] [2022-11-16 11:58:43,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:43,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-16 11:58:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-16 11:58:43,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1194, Invalid=12848, Unknown=0, NotChecked=0, Total=14042 [2022-11-16 11:58:43,406 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:51,013 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2022-11-16 11:58:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-16 11:58:51,013 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-16 11:58:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:51,014 INFO L225 Difference]: With dead ends: 142 [2022-11-16 11:58:51,014 INFO L226 Difference]: Without dead ends: 84 [2022-11-16 11:58:51,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10238 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=3151, Invalid=36649, Unknown=0, NotChecked=0, Total=39800 [2022-11-16 11:58:51,016 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 316 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 3072 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 3545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 3072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:51,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 1063 Invalid, 3545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 3072 Invalid, 0 Unknown, 347 Unchecked, 1.7s Time] [2022-11-16 11:58:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-16 11:58:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-11-16 11:58:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-11-16 11:58:51,036 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2022-11-16 11:58:51,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:51,036 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-11-16 11:58:51,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-11-16 11:58:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-16 11:58:51,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:51,037 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:51,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:51,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 11:58:51,239 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1697760395, now seen corresponding path program 31 times [2022-11-16 11:58:51,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:51,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912099168] [2022-11-16 11:58:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:53,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:53,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912099168] [2022-11-16 11:58:53,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912099168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:53,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268916239] [2022-11-16 11:58:53,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:58:53,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:53,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:53,241 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:53,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 11:58:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:53,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-16 11:58:53,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:54,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:58:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:56,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:56,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:58:56,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:58:56,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:58:56,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:58:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:56,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268916239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:56,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:56,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 83 [2022-11-16 11:58:56,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583048392] [2022-11-16 11:58:56,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:56,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-16 11:58:56,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-16 11:58:56,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=6562, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 11:58:56,803 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 83 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:59,506 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2022-11-16 11:58:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 11:58:59,511 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-16 11:58:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:59,512 INFO L225 Difference]: With dead ends: 89 [2022-11-16 11:58:59,512 INFO L226 Difference]: Without dead ends: 87 [2022-11-16 11:58:59,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=420, Invalid=10500, Unknown=0, NotChecked=0, Total=10920 [2022-11-16 11:58:59,514 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 151 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 3749 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:59,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1234 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3749 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 11:58:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-16 11:58:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-11-16 11:58:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-11-16 11:58:59,532 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2022-11-16 11:58:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:59,533 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-11-16 11:58:59,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-11-16 11:58:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 11:58:59,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:59,534 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:59,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:59,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 11:58:59,741 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash 449843218, now seen corresponding path program 32 times [2022-11-16 11:58:59,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:59,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030100134] [2022-11-16 11:58:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:59,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:00,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:00,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030100134] [2022-11-16 11:59:00,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030100134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:00,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707119905] [2022-11-16 11:59:00,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:59:00,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:00,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:00,664 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:00,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 11:59:00,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:59:00,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:00,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 11:59:00,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:01,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:02,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707119905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:02,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:59:02,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2022-11-16 11:59:02,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107115881] [2022-11-16 11:59:02,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:02,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 11:59:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:02,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 11:59:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 11:59:02,496 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:03,065 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2022-11-16 11:59:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 11:59:03,065 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-16 11:59:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:03,066 INFO L225 Difference]: With dead ends: 156 [2022-11-16 11:59:03,066 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 11:59:03,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 106 SyntacticMatches, 40 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3335 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1661, Invalid=5479, Unknown=0, NotChecked=0, Total=7140 [2022-11-16 11:59:03,067 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 263 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:03,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 189 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:59:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 11:59:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2022-11-16 11:59:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-11-16 11:59:03,100 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2022-11-16 11:59:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:03,100 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-11-16 11:59:03,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-11-16 11:59:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-16 11:59:03,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:03,101 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:03,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:03,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 11:59:03,307 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:03,308 INFO L85 PathProgramCache]: Analyzing trace with hash -751572408, now seen corresponding path program 33 times [2022-11-16 11:59:03,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:03,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811105990] [2022-11-16 11:59:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:03,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:05,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:05,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811105990] [2022-11-16 11:59:05,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811105990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:05,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376505283] [2022-11-16 11:59:05,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:59:05,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:05,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:05,343 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:05,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 11:59:08,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-11-16 11:59:08,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:08,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 11:59:08,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:09,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:59:11,348 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 11:59:11,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2022-11-16 11:59:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 532 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:11,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:14,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:59:14,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-11-16 11:59:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 513 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:17,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376505283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:17,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:59:17,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 129 [2022-11-16 11:59:17,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415648511] [2022-11-16 11:59:17,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:17,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-11-16 11:59:17,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:17,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-11-16 11:59:17,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1374, Invalid=15138, Unknown=0, NotChecked=0, Total=16512 [2022-11-16 11:59:17,191 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 129 states, 129 states have (on average 1.9224806201550388) internal successors, (248), 129 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:23,372 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2022-11-16 11:59:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-16 11:59:23,373 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9224806201550388) internal successors, (248), 129 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-16 11:59:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:23,374 INFO L225 Difference]: With dead ends: 151 [2022-11-16 11:59:23,374 INFO L226 Difference]: Without dead ends: 87 [2022-11-16 11:59:23,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7888 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=3438, Invalid=32094, Unknown=0, NotChecked=0, Total=35532 [2022-11-16 11:59:23,375 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 258 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 3366 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 3603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:23,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1135 Invalid, 3603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3366 Invalid, 0 Unknown, 144 Unchecked, 1.8s Time] [2022-11-16 11:59:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-16 11:59:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-16 11:59:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-11-16 11:59:23,398 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 85 [2022-11-16 11:59:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:23,398 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-11-16 11:59:23,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9224806201550388) internal successors, (248), 129 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-11-16 11:59:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 11:59:23,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:23,399 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:23,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:23,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:23,599 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:23,600 INFO L85 PathProgramCache]: Analyzing trace with hash 659248850, now seen corresponding path program 34 times [2022-11-16 11:59:23,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:23,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491971043] [2022-11-16 11:59:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:23,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:25,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:25,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491971043] [2022-11-16 11:59:25,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491971043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:25,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703006950] [2022-11-16 11:59:25,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:59:25,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:25,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:25,908 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:25,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 11:59:26,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:59:26,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:26,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 137 conjunts are in the unsatisfiable core [2022-11-16 11:59:26,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:27,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:59:27,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:27,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:59:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:29,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:29,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2022-11-16 11:59:29,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-11-16 11:59:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:29,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703006950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:29,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:59:29,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 89 [2022-11-16 11:59:29,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158554673] [2022-11-16 11:59:29,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:29,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-16 11:59:29,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:29,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-16 11:59:29,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=7568, Unknown=0, NotChecked=0, Total=7832 [2022-11-16 11:59:29,962 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 89 states, 89 states have (on average 1.9438202247191012) internal successors, (173), 89 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:33,383 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2022-11-16 11:59:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 11:59:33,383 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9438202247191012) internal successors, (173), 89 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-16 11:59:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:33,384 INFO L225 Difference]: With dead ends: 94 [2022-11-16 11:59:33,384 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 11:59:33,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3664 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=666, Invalid=16364, Unknown=0, NotChecked=0, Total=17030 [2022-11-16 11:59:33,385 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 161 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 3710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:33,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1250 Invalid, 3710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3687 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:59:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 11:59:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-11-16 11:59:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-11-16 11:59:33,417 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2022-11-16 11:59:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:33,417 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-11-16 11:59:33,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9438202247191012) internal successors, (173), 89 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:33,418 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-11-16 11:59:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 11:59:33,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:33,418 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:33,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:33,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 11:59:33,619 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1198160789, now seen corresponding path program 35 times [2022-11-16 11:59:33,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:33,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018647239] [2022-11-16 11:59:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:33,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:36,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:36,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018647239] [2022-11-16 11:59:36,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018647239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:36,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063118269] [2022-11-16 11:59:36,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:59:36,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:36,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:36,365 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:36,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 11:59:37,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-11-16 11:59:37,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:37,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-16 11:59:37,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:37,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:59:39,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-11-16 11:59:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:39,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:41,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 11:59:41,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:59:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:43,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063118269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:43,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:59:43,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 112 [2022-11-16 11:59:43,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907857086] [2022-11-16 11:59:43,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:43,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-11-16 11:59:43,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:43,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-11-16 11:59:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=12076, Unknown=0, NotChecked=0, Total=12432 [2022-11-16 11:59:43,119 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 112 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:47,385 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2022-11-16 11:59:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 11:59:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-16 11:59:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:47,386 INFO L225 Difference]: With dead ends: 97 [2022-11-16 11:59:47,386 INFO L226 Difference]: Without dead ends: 95 [2022-11-16 11:59:47,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3151 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=604, Invalid=18578, Unknown=0, NotChecked=0, Total=19182 [2022-11-16 11:59:47,387 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 99 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 4678 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 4702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 4678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:47,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1439 Invalid, 4702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 4678 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 11:59:47,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-16 11:59:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-11-16 11:59:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-11-16 11:59:47,429 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2022-11-16 11:59:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:47,430 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-11-16 11:59:47,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-11-16 11:59:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 11:59:47,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:47,430 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:47,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:47,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 11:59:47,631 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1069925426, now seen corresponding path program 36 times [2022-11-16 11:59:47,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:47,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899907813] [2022-11-16 11:59:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:47,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:48,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:48,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899907813] [2022-11-16 11:59:48,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899907813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438813223] [2022-11-16 11:59:48,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:59:48,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:48,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:48,867 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:48,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 11:59:51,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-11-16 11:59:51,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 11:59:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:52,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:53,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438813223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:53,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:59:53,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2022-11-16 11:59:53,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991465343] [2022-11-16 11:59:53,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:53,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-16 11:59:53,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:53,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-16 11:59:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2022-11-16 11:59:53,764 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:54,371 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-11-16 11:59:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:59:54,372 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-16 11:59:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:54,373 INFO L225 Difference]: With dead ends: 170 [2022-11-16 11:59:54,373 INFO L226 Difference]: Without dead ends: 100 [2022-11-16 11:59:54,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 116 SyntacticMatches, 44 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2022-11-16 11:59:54,374 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 301 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:54,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 185 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:59:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-16 11:59:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2022-11-16 11:59:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-11-16 11:59:54,402 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2022-11-16 11:59:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:54,402 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-11-16 11:59:54,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-11-16 11:59:54,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-16 11:59:54,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:54,403 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:54,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:54,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 11:59:54,611 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:54,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:54,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1914636392, now seen corresponding path program 37 times [2022-11-16 11:59:54,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:54,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837916597] [2022-11-16 11:59:54,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:54,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:57,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:57,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837916597] [2022-11-16 11:59:57,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837916597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:57,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082268319] [2022-11-16 11:59:57,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:59:57,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:57,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:57,140 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:57,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 11:59:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:57,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 146 conjunts are in the unsatisfiable core [2022-11-16 11:59:57,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:58,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:00:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:01,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:01,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:00:01,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:00:01,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:00:01,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:00:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:01,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082268319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:01,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:01,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-11-16 12:00:01,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880803287] [2022-11-16 12:00:01,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:01,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-16 12:00:01,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:01,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-16 12:00:01,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=8650, Unknown=0, NotChecked=0, Total=8930 [2022-11-16 12:00:01,654 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 95 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 95 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:05,044 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2022-11-16 12:00:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 12:00:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 95 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-11-16 12:00:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:05,048 INFO L225 Difference]: With dead ends: 101 [2022-11-16 12:00:05,048 INFO L226 Difference]: Without dead ends: 99 [2022-11-16 12:00:05,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=480, Invalid=13800, Unknown=0, NotChecked=0, Total=14280 [2022-11-16 12:00:05,050 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 4884 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 4907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:05,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1575 Invalid, 4907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4884 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 12:00:05,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-16 12:00:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-11-16 12:00:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-11-16 12:00:05,074 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2022-11-16 12:00:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:05,074 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-11-16 12:00:05,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 95 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-11-16 12:00:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 12:00:05,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:05,075 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:05,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:05,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 12:00:05,275 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:05,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1771856661, now seen corresponding path program 38 times [2022-11-16 12:00:05,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:05,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065161358] [2022-11-16 12:00:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:05,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:06,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:06,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065161358] [2022-11-16 12:00:06,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065161358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:06,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779187861] [2022-11-16 12:00:06,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:00:06,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:06,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:06,493 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:06,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 12:00:06,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:00:06,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 12:00:06,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:07,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:08,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779187861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:08,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:08,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2022-11-16 12:00:08,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979089008] [2022-11-16 12:00:08,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:08,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 12:00:08,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:08,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 12:00:08,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4149, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 12:00:08,797 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:09,494 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2022-11-16 12:00:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 12:00:09,495 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-11-16 12:00:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:09,496 INFO L225 Difference]: With dead ends: 177 [2022-11-16 12:00:09,496 INFO L226 Difference]: Without dead ends: 104 [2022-11-16 12:00:09,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 121 SyntacticMatches, 46 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4355 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2150, Invalid=7162, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 12:00:09,498 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 288 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:09,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 255 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:00:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-16 12:00:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2022-11-16 12:00:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-11-16 12:00:09,537 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2022-11-16 12:00:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:09,538 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-11-16 12:00:09,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-11-16 12:00:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-16 12:00:09,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:09,539 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:09,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:09,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-16 12:00:09,745 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2001953717, now seen corresponding path program 39 times [2022-11-16 12:00:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:09,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681287940] [2022-11-16 12:00:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:12,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:12,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681287940] [2022-11-16 12:00:12,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681287940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:12,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463180370] [2022-11-16 12:00:12,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:00:12,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:12,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:12,245 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:12,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 12:00:17,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-16 12:00:17,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:17,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-16 12:00:17,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:18,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:00:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:21,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:24,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:00:24,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:00:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:26,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463180370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:26,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:26,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 147 [2022-11-16 12:00:26,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208796608] [2022-11-16 12:00:26,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:26,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-11-16 12:00:26,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-11-16 12:00:26,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1361, Invalid=20101, Unknown=0, NotChecked=0, Total=21462 [2022-11-16 12:00:26,599 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 147 states, 147 states have (on average 1.9319727891156462) internal successors, (284), 147 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:52,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:52,549 INFO L93 Difference]: Finished difference Result 251 states and 277 transitions. [2022-11-16 12:00:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-11-16 12:00:52,550 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9319727891156462) internal successors, (284), 147 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-11-16 12:00:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:52,551 INFO L225 Difference]: With dead ends: 251 [2022-11-16 12:00:52,551 INFO L226 Difference]: Without dead ends: 249 [2022-11-16 12:00:52,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18260 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=5211, Invalid=67419, Unknown=0, NotChecked=0, Total=72630 [2022-11-16 12:00:52,556 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1365 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 6454 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 7148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 6454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:52,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1365 Valid, 2266 Invalid, 7148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 6454 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-16 12:00:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-16 12:00:52,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 172. [2022-11-16 12:00:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-11-16 12:00:52,631 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 97 [2022-11-16 12:00:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:52,631 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-11-16 12:00:52,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9319727891156462) internal successors, (284), 147 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-11-16 12:00:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 12:00:52,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:52,632 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:52,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-16 12:00:52,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:52,833 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:52,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash 745393800, now seen corresponding path program 40 times [2022-11-16 12:00:52,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:52,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563953303] [2022-11-16 12:00:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:52,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:55,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:55,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563953303] [2022-11-16 12:00:55,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563953303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:55,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018147275] [2022-11-16 12:00:55,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:00:55,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:55,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:55,623 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:55,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 12:00:55,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:00:55,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:55,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 158 conjunts are in the unsatisfiable core [2022-11-16 12:00:55,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:57,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:01:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:00,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:00,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:01:00,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:01:00,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:01:00,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:01:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:00,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018147275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:00,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:00,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 103 [2022-11-16 12:01:00,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75093694] [2022-11-16 12:01:00,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:00,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-16 12:01:00,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-16 12:01:00,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=10202, Unknown=0, NotChecked=0, Total=10506 [2022-11-16 12:01:00,801 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 103 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:04,856 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2022-11-16 12:01:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-16 12:01:04,856 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-16 12:01:04,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:04,857 INFO L225 Difference]: With dead ends: 252 [2022-11-16 12:01:04,858 INFO L226 Difference]: Without dead ends: 250 [2022-11-16 12:01:04,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=525, Invalid=16505, Unknown=0, NotChecked=0, Total=17030 [2022-11-16 12:01:04,859 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 117 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 5603 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 5629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 5603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:04,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 2024 Invalid, 5629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 5603 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 12:01:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-16 12:01:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 172. [2022-11-16 12:01:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-11-16 12:01:04,941 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 101 [2022-11-16 12:01:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:04,941 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-11-16 12:01:04,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-11-16 12:01:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-16 12:01:04,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:04,943 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:04,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:05,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:05,144 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1050568949, now seen corresponding path program 41 times [2022-11-16 12:01:05,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:05,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775246383] [2022-11-16 12:01:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:05,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:06,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:06,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775246383] [2022-11-16 12:01:06,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775246383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:06,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586820890] [2022-11-16 12:01:06,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:01:06,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:06,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:06,516 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:06,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-16 12:01:07,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-11-16 12:01:07,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:07,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 12:01:07,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:08,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:09,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586820890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:09,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:09,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2022-11-16 12:01:09,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23482105] [2022-11-16 12:01:09,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:09,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-16 12:01:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-16 12:01:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=4859, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 12:01:09,802 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:11,403 INFO L93 Difference]: Finished difference Result 329 states and 332 transitions. [2022-11-16 12:01:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-16 12:01:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-11-16 12:01:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:11,405 INFO L225 Difference]: With dead ends: 329 [2022-11-16 12:01:11,405 INFO L226 Difference]: Without dead ends: 112 [2022-11-16 12:01:11,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 131 SyntacticMatches, 50 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6634 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3589, Invalid=13181, Unknown=0, NotChecked=0, Total=16770 [2022-11-16 12:01:11,407 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 543 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:11,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 300 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:01:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-16 12:01:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2022-11-16 12:01:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-11-16 12:01:11,500 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2022-11-16 12:01:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:11,500 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-11-16 12:01:11,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-11-16 12:01:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-16 12:01:11,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:11,502 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:11,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:11,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:11,711 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:11,711 INFO L85 PathProgramCache]: Analyzing trace with hash -791344085, now seen corresponding path program 42 times [2022-11-16 12:01:11,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:11,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210401934] [2022-11-16 12:01:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:11,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:14,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:14,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210401934] [2022-11-16 12:01:14,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210401934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:14,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535815827] [2022-11-16 12:01:14,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:01:14,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:14,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:14,398 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:14,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 12:01:16,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-11-16 12:01:16,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:16,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-16 12:01:16,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:17,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:01:19,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-11-16 12:01:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:19,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:19,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:01:19,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:01:19,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:01:19,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:01:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:19,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535815827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:19,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:19,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 80 [2022-11-16 12:01:19,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914471487] [2022-11-16 12:01:19,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:19,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-16 12:01:19,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:19,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-16 12:01:19,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=6112, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 12:01:19,956 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 80 states, 80 states have (on average 2.2625) internal successors, (181), 80 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:23,954 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2022-11-16 12:01:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-16 12:01:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2625) internal successors, (181), 80 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-11-16 12:01:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:23,956 INFO L225 Difference]: With dead ends: 113 [2022-11-16 12:01:23,956 INFO L226 Difference]: Without dead ends: 111 [2022-11-16 12:01:23,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=403, Invalid=11153, Unknown=0, NotChecked=0, Total=11556 [2022-11-16 12:01:23,957 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 113 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 5526 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 5552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 5526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:23,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1839 Invalid, 5552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 5526 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 12:01:23,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-16 12:01:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-11-16 12:01:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-11-16 12:01:24,016 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 105 [2022-11-16 12:01:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:24,016 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-11-16 12:01:24,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2625) internal successors, (181), 80 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-11-16 12:01:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-16 12:01:24,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:24,017 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:24,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:24,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:24,218 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:24,218 INFO L85 PathProgramCache]: Analyzing trace with hash 148644978, now seen corresponding path program 43 times [2022-11-16 12:01:24,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:24,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023541154] [2022-11-16 12:01:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:24,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:25,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:25,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023541154] [2022-11-16 12:01:25,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023541154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:25,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713915361] [2022-11-16 12:01:25,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:01:25,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:25,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:25,628 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:25,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-16 12:01:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:25,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-16 12:01:25,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:27,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:28,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713915361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:28,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:28,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2022-11-16 12:01:28,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499451888] [2022-11-16 12:01:28,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:28,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-16 12:01:28,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:28,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-16 12:01:28,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 12:01:28,394 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:29,272 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2022-11-16 12:01:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 12:01:29,272 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-11-16 12:01:29,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:29,273 INFO L225 Difference]: With dead ends: 198 [2022-11-16 12:01:29,273 INFO L226 Difference]: Without dead ends: 116 [2022-11-16 12:01:29,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 136 SyntacticMatches, 52 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5510 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2702, Invalid=9070, Unknown=0, NotChecked=0, Total=11772 [2022-11-16 12:01:29,274 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 348 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:29,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 267 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:01:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-16 12:01:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2022-11-16 12:01:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-11-16 12:01:29,341 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2022-11-16 12:01:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:29,342 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-11-16 12:01:29,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-11-16 12:01:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-16 12:01:29,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:29,343 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:29,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:29,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:29,552 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1946010456, now seen corresponding path program 44 times [2022-11-16 12:01:29,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:29,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23711638] [2022-11-16 12:01:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:29,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:32,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23711638] [2022-11-16 12:01:32,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23711638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:32,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330218338] [2022-11-16 12:01:32,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:01:32,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:32,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:32,520 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:32,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-16 12:01:32,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:01:32,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:32,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 170 conjunts are in the unsatisfiable core [2022-11-16 12:01:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:34,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:01:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:37,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:38,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:01:38,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:01:38,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:01:38,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:01:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:38,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330218338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:38,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:38,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 111 [2022-11-16 12:01:38,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042520617] [2022-11-16 12:01:38,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:38,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-11-16 12:01:38,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-11-16 12:01:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=11882, Unknown=0, NotChecked=0, Total=12210 [2022-11-16 12:01:38,340 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:42,882 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2022-11-16 12:01:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-16 12:01:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-16 12:01:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:42,884 INFO L225 Difference]: With dead ends: 117 [2022-11-16 12:01:42,884 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 12:01:42,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=560, Invalid=18900, Unknown=0, NotChecked=0, Total=19460 [2022-11-16 12:01:42,885 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 117 mSDsluCounter, 2173 mSDsCounter, 0 mSdLazyCounter, 6570 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 6597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 6570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:42,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 2205 Invalid, 6597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 6570 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 12:01:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 12:01:42,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2022-11-16 12:01:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-11-16 12:01:42,955 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2022-11-16 12:01:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:42,956 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-11-16 12:01:42,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-11-16 12:01:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 12:01:42,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:42,957 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:42,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:43,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 12:01:43,163 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:43,164 INFO L85 PathProgramCache]: Analyzing trace with hash -124139819, now seen corresponding path program 45 times [2022-11-16 12:01:43,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:43,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088410499] [2022-11-16 12:01:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:43,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:44,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088410499] [2022-11-16 12:01:44,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088410499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:44,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156387990] [2022-11-16 12:01:44,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:01:44,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:44,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:44,695 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:44,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-16 12:01:50,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-11-16 12:01:50,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:50,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 12:01:50,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:51,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:53,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156387990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:53,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:53,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2022-11-16 12:01:53,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193364405] [2022-11-16 12:01:53,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:53,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-16 12:01:53,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-16 12:01:53,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=5625, Unknown=0, NotChecked=0, Total=7310 [2022-11-16 12:01:53,025 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:53,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:53,945 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2022-11-16 12:01:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-16 12:01:53,945 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-11-16 12:01:53,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:53,946 INFO L225 Difference]: With dead ends: 205 [2022-11-16 12:01:53,946 INFO L226 Difference]: Without dead ends: 120 [2022-11-16 12:01:53,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 141 SyntacticMatches, 54 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5925 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2900, Invalid=9756, Unknown=0, NotChecked=0, Total=12656 [2022-11-16 12:01:53,948 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 386 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:53,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 245 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:01:53,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-16 12:01:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2022-11-16 12:01:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-11-16 12:01:54,050 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2022-11-16 12:01:54,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:54,050 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-11-16 12:01:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-11-16 12:01:54,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 12:01:54,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:54,051 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:54,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-16 12:01:54,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 12:01:54,260 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:54,260 INFO L85 PathProgramCache]: Analyzing trace with hash -840117237, now seen corresponding path program 46 times [2022-11-16 12:01:54,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:54,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167047754] [2022-11-16 12:01:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:54,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:57,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167047754] [2022-11-16 12:01:57,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167047754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288196602] [2022-11-16 12:01:57,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:01:57,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:57,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:57,209 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:57,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-16 12:01:57,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:01:57,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:57,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 176 conjunts are in the unsatisfiable core [2022-11-16 12:01:57,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:59,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:02:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:02,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:03,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:02:03,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:02:03,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:02:03,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:02:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:03,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288196602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:03,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:03,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2022-11-16 12:02:03,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415064069] [2022-11-16 12:02:03,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:03,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-11-16 12:02:03,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:03,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-11-16 12:02:03,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=12770, Unknown=0, NotChecked=0, Total=13110 [2022-11-16 12:02:03,521 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 115 states, 115 states have (on average 1.9739130434782608) internal successors, (227), 115 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:08,427 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-11-16 12:02:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-16 12:02:08,427 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.9739130434782608) internal successors, (227), 115 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-11-16 12:02:08,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:08,428 INFO L225 Difference]: With dead ends: 121 [2022-11-16 12:02:08,428 INFO L226 Difference]: Without dead ends: 119 [2022-11-16 12:02:08,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3738 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=580, Invalid=20300, Unknown=0, NotChecked=0, Total=20880 [2022-11-16 12:02:08,430 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 117 mSDsluCounter, 2283 mSDsCounter, 0 mSdLazyCounter, 7121 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 7149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 7121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:08,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 2316 Invalid, 7149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 7121 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 12:02:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-16 12:02:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-11-16 12:02:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-11-16 12:02:08,523 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2022-11-16 12:02:08,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:08,524 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-11-16 12:02:08,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.9739130434782608) internal successors, (227), 115 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-11-16 12:02:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 12:02:08,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:08,525 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:08,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:08,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-16 12:02:08,731 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:08,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:08,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1153380206, now seen corresponding path program 47 times [2022-11-16 12:02:08,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:08,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738427169] [2022-11-16 12:02:08,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:08,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:10,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738427169] [2022-11-16 12:02:10,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738427169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492948233] [2022-11-16 12:02:10,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:02:10,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:10,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:10,352 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:10,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-16 12:02:11,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-11-16 12:02:11,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:11,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 12:02:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:13,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:14,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492948233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:14,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:14,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2022-11-16 12:02:14,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468284339] [2022-11-16 12:02:14,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:14,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-16 12:02:14,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-16 12:02:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1803, Invalid=6029, Unknown=0, NotChecked=0, Total=7832 [2022-11-16 12:02:14,595 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:15,584 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2022-11-16 12:02:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 12:02:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-16 12:02:15,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:15,586 INFO L225 Difference]: With dead ends: 212 [2022-11-16 12:02:15,586 INFO L226 Difference]: Without dead ends: 124 [2022-11-16 12:02:15,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 146 SyntacticMatches, 56 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6355 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3105, Invalid=10467, Unknown=0, NotChecked=0, Total=13572 [2022-11-16 12:02:15,588 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 392 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:15,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 325 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:02:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-16 12:02:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2022-11-16 12:02:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-11-16 12:02:15,705 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2022-11-16 12:02:15,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:15,705 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-11-16 12:02:15,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-11-16 12:02:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-16 12:02:15,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:15,706 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:15,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:15,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-16 12:02:15,915 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:15,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1765692104, now seen corresponding path program 48 times [2022-11-16 12:02:15,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:15,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588648968] [2022-11-16 12:02:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:15,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:19,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:19,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588648968] [2022-11-16 12:02:19,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588648968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:19,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558940853] [2022-11-16 12:02:19,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:02:19,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:19,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:19,146 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:19,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-16 12:02:26,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-11-16 12:02:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:26,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-16 12:02:26,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:26,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:02:29,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-11-16 12:02:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:29,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:29,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:02:29,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:02:29,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:02:29,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:02:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:29,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558940853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:29,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:29,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 89 [2022-11-16 12:02:29,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257801712] [2022-11-16 12:02:29,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:29,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-16 12:02:29,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:29,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-16 12:02:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=7600, Unknown=0, NotChecked=0, Total=7832 [2022-11-16 12:02:29,763 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 89 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:34,634 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2022-11-16 12:02:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-16 12:02:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 89 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-16 12:02:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:34,635 INFO L225 Difference]: With dead ends: 125 [2022-11-16 12:02:34,636 INFO L226 Difference]: Without dead ends: 123 [2022-11-16 12:02:34,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 200 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=448, Invalid=13832, Unknown=0, NotChecked=0, Total=14280 [2022-11-16 12:02:34,637 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 123 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 6741 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 6770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 6741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:34,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 2198 Invalid, 6770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 6741 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-16 12:02:34,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-16 12:02:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2022-11-16 12:02:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-11-16 12:02:34,707 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2022-11-16 12:02:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:34,707 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-11-16 12:02:34,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 89 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-11-16 12:02:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-16 12:02:34,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:34,708 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:34,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:34,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-16 12:02:34,909 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:34,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:34,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1273789621, now seen corresponding path program 49 times [2022-11-16 12:02:34,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:34,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704716246] [2022-11-16 12:02:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:34,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:36,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704716246] [2022-11-16 12:02:36,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704716246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870811779] [2022-11-16 12:02:36,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:02:36,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:36,750 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:36,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-16 12:02:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 12:02:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:38,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:40,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870811779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:40,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:40,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2022-11-16 12:02:40,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918856516] [2022-11-16 12:02:40,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:40,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-16 12:02:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-16 12:02:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1925, Invalid=6447, Unknown=0, NotChecked=0, Total=8372 [2022-11-16 12:02:40,097 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:41,130 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2022-11-16 12:02:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 12:02:41,130 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-16 12:02:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:41,131 INFO L225 Difference]: With dead ends: 219 [2022-11-16 12:02:41,131 INFO L226 Difference]: Without dead ends: 128 [2022-11-16 12:02:41,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 151 SyntacticMatches, 58 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6800 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3317, Invalid=11203, Unknown=0, NotChecked=0, Total=14520 [2022-11-16 12:02:41,132 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 438 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:41,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 281 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:02:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-16 12:02:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2022-11-16 12:02:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-11-16 12:02:41,193 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 120 [2022-11-16 12:02:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:41,193 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-11-16 12:02:41,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-11-16 12:02:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-16 12:02:41,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:41,194 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:41,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:41,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:41,395 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:41,395 INFO L85 PathProgramCache]: Analyzing trace with hash -565054485, now seen corresponding path program 50 times [2022-11-16 12:02:41,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:41,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738584495] [2022-11-16 12:02:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:41,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:44,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:44,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738584495] [2022-11-16 12:02:44,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738584495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:44,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238332543] [2022-11-16 12:02:44,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:02:44,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:44,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:44,778 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:44,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-16 12:02:45,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:45,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-16 12:02:45,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:47,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:02:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:50,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:51,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:02:51,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:02:51,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:02:51,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:02:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:51,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238332543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:51,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:51,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 123 [2022-11-16 12:02:51,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426242487] [2022-11-16 12:02:51,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:51,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-16 12:02:51,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:51,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-16 12:02:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=14642, Unknown=0, NotChecked=0, Total=15006 [2022-11-16 12:02:51,652 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 123 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:57,059 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2022-11-16 12:02:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-16 12:02:57,060 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-11-16 12:02:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:57,060 INFO L225 Difference]: With dead ends: 129 [2022-11-16 12:02:57,060 INFO L226 Difference]: Without dead ends: 127 [2022-11-16 12:02:57,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=620, Invalid=23250, Unknown=0, NotChecked=0, Total=23870 [2022-11-16 12:02:57,063 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 223 mSDsluCounter, 2654 mSDsCounter, 0 mSdLazyCounter, 7878 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 2689 SdHoareTripleChecker+Invalid, 7909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 7878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:57,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 2689 Invalid, 7909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 7878 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-16 12:02:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-16 12:02:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-16 12:02:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-11-16 12:02:57,157 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2022-11-16 12:02:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:57,157 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-11-16 12:02:57,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-11-16 12:02:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-16 12:02:57,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:57,158 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:57,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:57,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:57,365 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1556536142, now seen corresponding path program 51 times [2022-11-16 12:02:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:57,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032571531] [2022-11-16 12:02:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:57,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:59,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:59,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032571531] [2022-11-16 12:02:59,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032571531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:59,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217265558] [2022-11-16 12:02:59,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:02:59,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:59,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:59,194 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:59,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-16 12:03:10,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-11-16 12:03:10,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 12:03:10,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:12,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:13,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217265558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:13,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:13,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2022-11-16 12:03:13,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336340764] [2022-11-16 12:03:13,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:13,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-16 12:03:13,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:13,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-16 12:03:13,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=6879, Unknown=0, NotChecked=0, Total=8930 [2022-11-16 12:03:13,432 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:14,528 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2022-11-16 12:03:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 12:03:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-11-16 12:03:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:14,529 INFO L225 Difference]: With dead ends: 226 [2022-11-16 12:03:14,529 INFO L226 Difference]: Without dead ends: 132 [2022-11-16 12:03:14,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 156 SyntacticMatches, 60 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7260 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3536, Invalid=11964, Unknown=0, NotChecked=0, Total=15500 [2022-11-16 12:03:14,531 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 364 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:14,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 346 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:03:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-16 12:03:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-11-16 12:03:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-11-16 12:03:14,605 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 124 [2022-11-16 12:03:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:14,605 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-11-16 12:03:14,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-11-16 12:03:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-16 12:03:14,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:14,606 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:14,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:14,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-16 12:03:14,807 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:14,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:14,807 INFO L85 PathProgramCache]: Analyzing trace with hash 184815848, now seen corresponding path program 52 times [2022-11-16 12:03:14,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:14,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291963253] [2022-11-16 12:03:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:14,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:18,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291963253] [2022-11-16 12:03:18,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291963253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393697434] [2022-11-16 12:03:18,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:03:18,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:18,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:18,557 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:18,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-16 12:03:18,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:03:18,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:18,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 194 conjunts are in the unsatisfiable core [2022-11-16 12:03:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:21,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:03:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:25,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:25,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:03:25,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:03:25,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:03:25,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:03:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:26,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393697434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:26,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:26,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2022-11-16 12:03:26,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994127046] [2022-11-16 12:03:26,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:26,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-11-16 12:03:26,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-11-16 12:03:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=15626, Unknown=0, NotChecked=0, Total=16002 [2022-11-16 12:03:26,095 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 127 states, 127 states have (on average 1.9763779527559056) internal successors, (251), 127 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:32,199 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2022-11-16 12:03:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-16 12:03:32,199 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.9763779527559056) internal successors, (251), 127 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-11-16 12:03:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:32,200 INFO L225 Difference]: With dead ends: 133 [2022-11-16 12:03:32,200 INFO L226 Difference]: Without dead ends: 131 [2022-11-16 12:03:32,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4557 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=640, Invalid=24800, Unknown=0, NotChecked=0, Total=25440 [2022-11-16 12:03:32,202 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 131 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 8822 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 8853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 8822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:32,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 2871 Invalid, 8853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 8822 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 12:03:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-16 12:03:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-11-16 12:03:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-11-16 12:03:32,264 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2022-11-16 12:03:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:32,264 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-11-16 12:03:32,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.9763779527559056) internal successors, (251), 127 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-11-16 12:03:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-16 12:03:32,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:32,265 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:32,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-16 12:03:32,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-16 12:03:32,465 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:32,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:32,466 INFO L85 PathProgramCache]: Analyzing trace with hash -294352235, now seen corresponding path program 53 times [2022-11-16 12:03:32,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:32,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997055493] [2022-11-16 12:03:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:32,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:34,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:34,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997055493] [2022-11-16 12:03:34,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997055493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:34,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125849390] [2022-11-16 12:03:34,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:03:34,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:34,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:34,427 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:34,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-16 12:03:41,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-11-16 12:03:41,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:41,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 12:03:41,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:43,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:45,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125849390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:45,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:45,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2022-11-16 12:03:45,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387242834] [2022-11-16 12:03:45,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:45,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-16 12:03:45,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-16 12:03:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=7325, Unknown=0, NotChecked=0, Total=9506 [2022-11-16 12:03:45,019 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:46,150 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2022-11-16 12:03:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-16 12:03:46,151 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-11-16 12:03:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:46,152 INFO L225 Difference]: With dead ends: 233 [2022-11-16 12:03:46,152 INFO L226 Difference]: Without dead ends: 136 [2022-11-16 12:03:46,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 161 SyntacticMatches, 62 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7735 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3762, Invalid=12750, Unknown=0, NotChecked=0, Total=16512 [2022-11-16 12:03:46,154 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 432 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:46,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 305 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:03:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-16 12:03:46,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2022-11-16 12:03:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-11-16 12:03:46,241 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 128 [2022-11-16 12:03:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:46,241 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-11-16 12:03:46,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-11-16 12:03:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 12:03:46,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:46,243 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:46,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:46,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-16 12:03:46,455 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:46,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:46,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1642228683, now seen corresponding path program 54 times [2022-11-16 12:03:46,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:46,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009736081] [2022-11-16 12:03:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:46,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:50,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009736081] [2022-11-16 12:03:50,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009736081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399599156] [2022-11-16 12:03:50,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:03:50,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:50,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:50,686 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:50,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-16 12:04:01,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-11-16 12:04:01,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:01,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-16 12:04:01,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:01,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:04:05,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-11-16 12:04:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:05,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:05,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:04:05,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:04:05,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:04:05,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:04:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:06,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399599156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:06,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:06,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 98 [2022-11-16 12:04:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520421526] [2022-11-16 12:04:06,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:06,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-16 12:04:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-16 12:04:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=9250, Unknown=0, NotChecked=0, Total=9506 [2022-11-16 12:04:06,047 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 98 states, 98 states have (on average 2.2755102040816326) internal successors, (223), 98 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:12,004 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2022-11-16 12:04:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-16 12:04:12,005 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.2755102040816326) internal successors, (223), 98 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-16 12:04:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:12,006 INFO L225 Difference]: With dead ends: 137 [2022-11-16 12:04:12,006 INFO L226 Difference]: Without dead ends: 135 [2022-11-16 12:04:12,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 221 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=493, Invalid=16799, Unknown=0, NotChecked=0, Total=17292 [2022-11-16 12:04:12,007 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 137 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 8110 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 2648 SdHoareTripleChecker+Invalid, 8142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 8110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:12,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 2648 Invalid, 8142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 8110 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-16 12:04:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-16 12:04:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-11-16 12:04:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-11-16 12:04:12,077 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 129 [2022-11-16 12:04:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:12,077 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-11-16 12:04:12,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.2755102040816326) internal successors, (223), 98 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-11-16 12:04:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-16 12:04:12,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:12,078 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:12,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:12,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-16 12:04:12,279 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash -332980014, now seen corresponding path program 55 times [2022-11-16 12:04:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:12,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043552507] [2022-11-16 12:04:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:12,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:14,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:14,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043552507] [2022-11-16 12:04:14,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043552507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:14,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725176197] [2022-11-16 12:04:14,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:04:14,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:14,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:14,476 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:14,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-16 12:04:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:14,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 12:04:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:16,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:18,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725176197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:18,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:18,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2022-11-16 12:04:18,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77230981] [2022-11-16 12:04:18,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:18,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-16 12:04:18,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-16 12:04:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2315, Invalid=7785, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 12:04:18,554 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:19,804 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2022-11-16 12:04:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-16 12:04:19,805 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-11-16 12:04:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:19,806 INFO L225 Difference]: With dead ends: 240 [2022-11-16 12:04:19,806 INFO L226 Difference]: Without dead ends: 140 [2022-11-16 12:04:19,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 166 SyntacticMatches, 64 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8225 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3995, Invalid=13561, Unknown=0, NotChecked=0, Total=17556 [2022-11-16 12:04:19,807 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 691 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:19,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 317 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:04:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-16 12:04:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2022-11-16 12:04:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-11-16 12:04:19,881 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 132 [2022-11-16 12:04:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:19,882 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-11-16 12:04:19,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-11-16 12:04:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-16 12:04:19,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:19,883 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:19,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-16 12:04:20,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:20,083 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:20,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1186297608, now seen corresponding path program 56 times [2022-11-16 12:04:20,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:20,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272641173] [2022-11-16 12:04:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:20,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:24,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:24,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272641173] [2022-11-16 12:04:24,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272641173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:24,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550311831] [2022-11-16 12:04:24,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:04:24,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:24,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:24,055 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:24,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-16 12:04:24,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:04:24,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 206 conjunts are in the unsatisfiable core [2022-11-16 12:04:24,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:27,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:04:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:31,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:32,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:04:32,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:04:32,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:04:32,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:04:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:32,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550311831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:32,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:32,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 135 [2022-11-16 12:04:32,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049024085] [2022-11-16 12:04:32,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:32,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-11-16 12:04:32,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-11-16 12:04:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=17690, Unknown=0, NotChecked=0, Total=18090 [2022-11-16 12:04:32,648 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 135 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:38,948 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2022-11-16 12:04:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-16 12:04:38,949 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 135 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-11-16 12:04:38,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:38,950 INFO L225 Difference]: With dead ends: 141 [2022-11-16 12:04:38,950 INFO L226 Difference]: Without dead ends: 139 [2022-11-16 12:04:38,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=680, Invalid=28050, Unknown=0, NotChecked=0, Total=28730 [2022-11-16 12:04:38,951 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 143 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 8764 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2979 SdHoareTripleChecker+Invalid, 8797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 8764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:38,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 2979 Invalid, 8797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 8764 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 12:04:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-16 12:04:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-11-16 12:04:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-11-16 12:04:39,034 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 133 [2022-11-16 12:04:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:39,034 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-11-16 12:04:39,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 135 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-11-16 12:04:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-16 12:04:39,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:39,035 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:39,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:39,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:39,235 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:39,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2005921909, now seen corresponding path program 57 times [2022-11-16 12:04:39,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:39,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915631376] [2022-11-16 12:04:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:39,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1458 proven. 622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:41,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:41,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915631376] [2022-11-16 12:04:41,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915631376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:41,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260044752] [2022-11-16 12:04:41,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:04:41,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:41,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:41,438 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:41,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-16 12:05:29,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2022-11-16 12:05:29,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 12:05:29,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:31,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:33,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260044752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:33,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:33,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 104 [2022-11-16 12:05:33,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412269845] [2022-11-16 12:05:33,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:33,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-16 12:05:33,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-16 12:05:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=8259, Unknown=0, NotChecked=0, Total=10712 [2022-11-16 12:05:33,523 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 104 states, 104 states have (on average 2.3076923076923075) internal successors, (240), 104 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:34,782 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2022-11-16 12:05:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 12:05:34,783 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.3076923076923075) internal successors, (240), 104 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-11-16 12:05:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:34,784 INFO L225 Difference]: With dead ends: 247 [2022-11-16 12:05:34,784 INFO L226 Difference]: Without dead ends: 144 [2022-11-16 12:05:34,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 171 SyntacticMatches, 66 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8730 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4235, Invalid=14397, Unknown=0, NotChecked=0, Total=18632 [2022-11-16 12:05:34,786 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 494 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:34,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 347 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:05:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-16 12:05:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2022-11-16 12:05:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-11-16 12:05:34,881 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 136 [2022-11-16 12:05:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:34,881 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-11-16 12:05:34,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.3076923076923075) internal successors, (240), 104 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-11-16 12:05:34,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-16 12:05:34,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:34,882 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:34,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:35,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-16 12:05:35,083 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:05:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1711522901, now seen corresponding path program 58 times [2022-11-16 12:05:35,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:35,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906651659] [2022-11-16 12:05:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:35,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:39,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:39,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906651659] [2022-11-16 12:05:39,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906651659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:39,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118240289] [2022-11-16 12:05:39,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:05:39,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:39,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:39,784 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:39,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-16 12:05:40,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:05:40,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:40,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 146 conjunts are in the unsatisfiable core [2022-11-16 12:05:40,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:43,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:05:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:47,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:48,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:05:48,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:05:48,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:05:48,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:05:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:48,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118240289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:48,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:48,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2022-11-16 12:05:48,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865848770] [2022-11-16 12:05:48,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:48,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-11-16 12:05:48,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:48,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-11-16 12:05:48,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=18770, Unknown=0, NotChecked=0, Total=19182 [2022-11-16 12:05:48,535 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 139 states, 139 states have (on average 1.9784172661870503) internal successors, (275), 139 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:55,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:55,664 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2022-11-16 12:05:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-16 12:05:55,665 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.9784172661870503) internal successors, (275), 139 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-11-16 12:05:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:55,665 INFO L225 Difference]: With dead ends: 145 [2022-11-16 12:05:55,665 INFO L226 Difference]: Without dead ends: 143 [2022-11-16 12:05:55,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 202 SyntacticMatches, 3 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5457 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=700, Invalid=29750, Unknown=0, NotChecked=0, Total=30450 [2022-11-16 12:05:55,667 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 145 mSDsluCounter, 3656 mSDsCounter, 0 mSdLazyCounter, 10554 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 3695 SdHoareTripleChecker+Invalid, 10588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 10554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:55,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 3695 Invalid, 10588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 10554 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-16 12:05:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-16 12:05:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-11-16 12:05:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-11-16 12:05:55,763 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 137 [2022-11-16 12:05:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:55,763 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-11-16 12:05:55,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.9784172661870503) internal successors, (275), 139 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-11-16 12:05:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-16 12:05:55,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:55,764 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:55,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:55,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:55,965 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:05:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:55,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1877787890, now seen corresponding path program 59 times [2022-11-16 12:05:55,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:55,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774160284] [2022-11-16 12:05:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:55,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1553 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:58,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774160284] [2022-11-16 12:05:58,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774160284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113729704] [2022-11-16 12:05:58,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:05:58,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:58,307 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:58,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-16 12:06:08,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2022-11-16 12:06:08,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:08,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-16 12:06:08,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:10,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:12,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113729704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:12,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:12,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 107 [2022-11-16 12:06:12,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103133152] [2022-11-16 12:06:12,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:12,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-16 12:06:12,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:12,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-16 12:06:12,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2595, Invalid=8747, Unknown=0, NotChecked=0, Total=11342 [2022-11-16 12:06:12,442 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 107 states, 107 states have (on average 2.308411214953271) internal successors, (247), 107 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:13,820 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2022-11-16 12:06:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-16 12:06:13,820 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.308411214953271) internal successors, (247), 107 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-11-16 12:06:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:13,821 INFO L225 Difference]: With dead ends: 254 [2022-11-16 12:06:13,821 INFO L226 Difference]: Without dead ends: 148 [2022-11-16 12:06:13,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 176 SyntacticMatches, 68 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9250 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4482, Invalid=15258, Unknown=0, NotChecked=0, Total=19740 [2022-11-16 12:06:13,823 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 581 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:13,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 388 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:06:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-16 12:06:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2022-11-16 12:06:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-11-16 12:06:13,899 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 140 [2022-11-16 12:06:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:13,900 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-11-16 12:06:13,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.308411214953271) internal successors, (247), 107 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-11-16 12:06:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-16 12:06:13,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:13,901 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:13,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:14,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:14,103 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1607170776, now seen corresponding path program 60 times [2022-11-16 12:06:14,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511745290] [2022-11-16 12:06:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:14,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:18,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:18,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511745290] [2022-11-16 12:06:18,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511745290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:18,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653258246] [2022-11-16 12:06:18,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:06:18,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:18,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:18,882 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:18,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-16 12:06:42,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-11-16 12:06:42,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:42,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 148 conjunts are in the unsatisfiable core [2022-11-16 12:06:42,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:43,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:06:47,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-11-16 12:06:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:47,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:47,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:06:47,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:06:47,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:06:47,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:06:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:48,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653258246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:48,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:48,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 107 [2022-11-16 12:06:48,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577740050] [2022-11-16 12:06:48,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:48,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-16 12:06:48,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-16 12:06:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=11062, Unknown=0, NotChecked=0, Total=11342 [2022-11-16 12:06:48,133 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 107 states, 107 states have (on average 2.2803738317757007) internal successors, (244), 107 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:55,497 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2022-11-16 12:06:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-16 12:06:55,498 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2803738317757007) internal successors, (244), 107 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-11-16 12:06:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:55,499 INFO L225 Difference]: With dead ends: 149 [2022-11-16 12:06:55,499 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 12:06:55,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 242 SyntacticMatches, 5 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=538, Invalid=20054, Unknown=0, NotChecked=0, Total=20592 [2022-11-16 12:06:55,501 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 149 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 9676 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 3175 SdHoareTripleChecker+Invalid, 9711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 9676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:55,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 3175 Invalid, 9711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 9676 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-16 12:06:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 12:06:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2022-11-16 12:06:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-11-16 12:06:55,624 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 141 [2022-11-16 12:06:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:55,624 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-11-16 12:06:55,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2803738317757007) internal successors, (244), 107 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-11-16 12:06:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-16 12:06:55,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:55,625 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:55,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:55,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-11-16 12:06:55,839 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1075621461, now seen corresponding path program 61 times [2022-11-16 12:06:55,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:55,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346764238] [2022-11-16 12:06:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:55,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1651 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:58,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:58,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346764238] [2022-11-16 12:06:58,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346764238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:58,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044445548] [2022-11-16 12:06:58,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:06:58,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:58,754 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:58,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-16 12:06:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:59,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-16 12:06:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:01,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:03,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044445548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:03,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:03,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 110 [2022-11-16 12:07:03,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826161429] [2022-11-16 12:07:03,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:03,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-16 12:07:03,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-16 12:07:03,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2741, Invalid=9249, Unknown=0, NotChecked=0, Total=11990 [2022-11-16 12:07:03,851 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 110 states, 110 states have (on average 2.309090909090909) internal successors, (254), 110 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:05,328 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2022-11-16 12:07:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-16 12:07:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.309090909090909) internal successors, (254), 110 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-11-16 12:07:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:05,331 INFO L225 Difference]: With dead ends: 261 [2022-11-16 12:07:05,331 INFO L226 Difference]: Without dead ends: 152 [2022-11-16 12:07:05,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 181 SyntacticMatches, 70 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9785 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4736, Invalid=16144, Unknown=0, NotChecked=0, Total=20880 [2022-11-16 12:07:05,333 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 438 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:05,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 414 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:07:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-16 12:07:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2022-11-16 12:07:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2022-11-16 12:07:05,454 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 144 [2022-11-16 12:07:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:05,454 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2022-11-16 12:07:05,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.309090909090909) internal successors, (254), 110 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2022-11-16 12:07:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-16 12:07:05,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:05,456 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:05,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:05,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:05,668 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:05,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1988271221, now seen corresponding path program 62 times [2022-11-16 12:07:05,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:05,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306998573] [2022-11-16 12:07:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:11,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:11,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306998573] [2022-11-16 12:07:11,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306998573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:11,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924189149] [2022-11-16 12:07:11,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:11,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:11,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:11,169 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:11,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-16 12:07:11,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:07:11,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:11,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 224 conjunts are in the unsatisfiable core [2022-11-16 12:07:11,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:15,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:07:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:21,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:21,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:07:21,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:07:21,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:07:21,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:07:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:22,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924189149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:22,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:22,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 147 [2022-11-16 12:07:22,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931856528] [2022-11-16 12:07:22,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:22,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-11-16 12:07:22,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:22,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-11-16 12:07:22,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=21026, Unknown=0, NotChecked=0, Total=21462 [2022-11-16 12:07:22,094 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 147 states, 147 states have (on average 1.9795918367346939) internal successors, (291), 147 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:30,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:30,804 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2022-11-16 12:07:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-16 12:07:30,804 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.9795918367346939) internal successors, (291), 147 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2022-11-16 12:07:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:30,805 INFO L225 Difference]: With dead ends: 153 [2022-11-16 12:07:30,805 INFO L226 Difference]: Without dead ends: 151 [2022-11-16 12:07:30,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6102 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=740, Invalid=33300, Unknown=0, NotChecked=0, Total=34040 [2022-11-16 12:07:30,807 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 153 mSDsluCounter, 3894 mSDsCounter, 0 mSdLazyCounter, 11496 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 3935 SdHoareTripleChecker+Invalid, 11532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 11496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:30,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 3935 Invalid, 11532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 11496 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-16 12:07:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-16 12:07:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-11-16 12:07:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-11-16 12:07:30,895 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 145 [2022-11-16 12:07:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:30,895 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-11-16 12:07:30,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.9795918367346939) internal successors, (291), 147 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-11-16 12:07:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-16 12:07:30,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:30,897 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:30,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:31,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:31,104 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:31,105 INFO L85 PathProgramCache]: Analyzing trace with hash -689172206, now seen corresponding path program 63 times [2022-11-16 12:07:31,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:31,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13422530] [2022-11-16 12:07:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:31,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1752 proven. 733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:33,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:33,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13422530] [2022-11-16 12:07:33,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13422530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:33,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970046661] [2022-11-16 12:07:33,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:07:33,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:33,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:33,982 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:33,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-16 12:08:04,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2022-11-16 12:08:04,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-16 12:08:04,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:07,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:09,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970046661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:09,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:09,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 113 [2022-11-16 12:08:09,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540656588] [2022-11-16 12:08:09,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:09,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-16 12:08:09,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:09,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-16 12:08:09,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2891, Invalid=9765, Unknown=0, NotChecked=0, Total=12656 [2022-11-16 12:08:09,513 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 113 states, 113 states have (on average 2.309734513274336) internal successors, (261), 113 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:11,026 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2022-11-16 12:08:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-16 12:08:11,027 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.309734513274336) internal successors, (261), 113 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-11-16 12:08:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:11,028 INFO L225 Difference]: With dead ends: 268 [2022-11-16 12:08:11,028 INFO L226 Difference]: Without dead ends: 156 [2022-11-16 12:08:11,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 186 SyntacticMatches, 72 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10335 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4997, Invalid=17055, Unknown=0, NotChecked=0, Total=22052 [2022-11-16 12:08:11,030 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 544 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:11,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 321 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:08:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-16 12:08:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2022-11-16 12:08:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2022-11-16 12:08:11,116 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 148 [2022-11-16 12:08:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:11,117 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2022-11-16 12:08:11,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.309734513274336) internal successors, (261), 113 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2022-11-16 12:08:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-16 12:08:11,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:11,118 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:11,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-16 12:08:11,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:11,333 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:11,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1776499528, now seen corresponding path program 64 times [2022-11-16 12:08:11,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:11,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385802276] [2022-11-16 12:08:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:11,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:17,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:17,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385802276] [2022-11-16 12:08:17,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385802276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:17,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419754138] [2022-11-16 12:08:17,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:08:17,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:17,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:17,140 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:17,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-16 12:08:17,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:08:17,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 230 conjunts are in the unsatisfiable core [2022-11-16 12:08:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:21,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:08:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:28,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:29,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:08:29,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:08:29,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:08:29,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 12:08:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:29,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419754138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:29,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:29,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 151 [2022-11-16 12:08:29,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306834371] [2022-11-16 12:08:29,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:29,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-11-16 12:08:29,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-11-16 12:08:29,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=22202, Unknown=0, NotChecked=0, Total=22650 [2022-11-16 12:08:29,279 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:38,714 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2022-11-16 12:08:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-16 12:08:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-11-16 12:08:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:38,715 INFO L225 Difference]: With dead ends: 157 [2022-11-16 12:08:38,715 INFO L226 Difference]: Without dead ends: 155 [2022-11-16 12:08:38,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6438 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=760, Invalid=35150, Unknown=0, NotChecked=0, Total=35910 [2022-11-16 12:08:38,717 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 159 mSDsluCounter, 4259 mSDsCounter, 0 mSdLazyCounter, 12416 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 4301 SdHoareTripleChecker+Invalid, 12453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 12416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:38,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 4301 Invalid, 12453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 12416 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-16 12:08:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-16 12:08:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2022-11-16 12:08:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2022-11-16 12:08:38,828 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 149 [2022-11-16 12:08:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:38,828 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2022-11-16 12:08:38,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.9801324503311257) internal successors, (299), 151 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2022-11-16 12:08:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-16 12:08:38,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:38,830 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:38,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:39,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:39,038 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1115210805, now seen corresponding path program 65 times [2022-11-16 12:08:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:39,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394385946] [2022-11-16 12:08:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:39,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1856 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:42,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:42,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394385946] [2022-11-16 12:08:42,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394385946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:42,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092969557] [2022-11-16 12:08:42,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:08:42,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:42,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:42,047 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:42,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-16 12:08:45,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2022-11-16 12:08:45,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:45,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-16 12:08:45,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:48,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:51,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092969557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:51,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:51,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 116 [2022-11-16 12:08:51,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443967931] [2022-11-16 12:08:51,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:51,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-16 12:08:51,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-16 12:08:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3045, Invalid=10295, Unknown=0, NotChecked=0, Total=13340 [2022-11-16 12:08:51,028 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 116 states, 116 states have (on average 2.310344827586207) internal successors, (268), 116 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:52,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:52,644 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2022-11-16 12:08:52,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-16 12:08:52,645 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.310344827586207) internal successors, (268), 116 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-16 12:08:52,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:52,646 INFO L225 Difference]: With dead ends: 275 [2022-11-16 12:08:52,646 INFO L226 Difference]: Without dead ends: 160 [2022-11-16 12:08:52,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 191 SyntacticMatches, 74 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10900 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5265, Invalid=17991, Unknown=0, NotChecked=0, Total=23256 [2022-11-16 12:08:52,649 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 690 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:52,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 390 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:08:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-16 12:08:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-11-16 12:08:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-11-16 12:08:52,732 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 152 [2022-11-16 12:08:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:52,732 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-11-16 12:08:52,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.310344827586207) internal successors, (268), 116 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-11-16 12:08:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-16 12:08:52,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:52,733 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:52,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:52,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:52,943 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:08:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash -725359765, now seen corresponding path program 66 times [2022-11-16 12:08:52,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:52,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230581090] [2022-11-16 12:08:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:52,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:59,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:59,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230581090] [2022-11-16 12:08:59,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230581090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:59,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668566496] [2022-11-16 12:08:59,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:08:59,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:59,597 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:59,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_159a5183-ad08-4c5f-ad93-82a62af7e40e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process